Used to put tapered fork into non-tapered frame. Frame must be 44mm and have a depth of 15mm or you must carefully remove 6mm to fit in 9.5mm deep frame tubes. Accomplished by using a jig and a disc sander. Otherwise buy the Hope version, no grinding necessary.

Was exactly what I needed to use a nice Fox fork on my son's DB MTB that has a straight steerer. Make sure you know the depth of the cup bore on the bike you're installing this on! I had to remove 3 mm's from this adapter cup to make it work, as it is 12mm's, and the bike it was installed on was only 9mm. I did this using my engine lathe.

This headset worked on my older Pivot Mach 5 frame that is designed to use a Zero-Stack 1-1/8" fork. It allows the use of a tapered fork by replacing the lower headset with an external one that is large enough to fit a tapered fork. Raised the front of the bike about 3/8" which I hardly notice, works great for converting zero-stack frames to tapered forks. NOTE: you will need to use the top of a zero stack headset, or keep your old one, because this is only the lower part & headset race you pound onto the fork, it also has a seal.

I had purchased a used Fox 32 Talas fork that was tapered, and needed to make it fit on my Fuji frame which used a straight 1 1/8 RockShok. I search on-line for solutions and this fit perfectly. You just need to make sure that the diameter on the head tube is the correct one. In my case I had a small lip inside the head tube so the cup will not fit flushed. Did more research and needed the head tube to be "faced", took it to the LBS and expend an extra $40 to get it done but well worth it. Other than that, it's perfect.

This is a well made bottom cup and bearing that will allow you to install a tapered fork in the straight 1 1'8" head tube. I used a belt sander to shave a little metal off the top (down to that first lip) so the cup could insert fully into my head tube and I think for most frames this will need done. If you are a little handy it's not that bad of a shore to fit it. It adds a little height to the front end but it is pretty unnoticeable especially if you are installing a suspension front end which I did.

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Description:
Cane Creek 40 Series EC34 Headset The 40-Series
is the workhorse line of Cane Creek's headsets. The 40-Series borrows design features from their premium 110-Series, incorporating all the features necessary for a durable, light-weight, long-lasting headset that represents the perfect ...

Description:
The 40-Series is the work-horse of Cane Creek’s
headset line-up. The series incorporates all the features necessary for a durable, light-weight, long-lasting headset and represents the perfect balance of performance, durability and value. 6061 T-6 Aluminum cups Innovative Clip-Seal High ...